<script setup>
import { getCartListAPI, updateCartAPI, toggleAllSelectAPI, deleteCartAPI } from '@/api/cart';
import { useUserStore } from '@/store/user';
import { ref, computed } from 'vue';
import { onShow } from '@dcloudio/uni-app';

const store = useUserStore()

// 获取购物车列表
const list = ref([])
const getCartList = async () => {
  const { result } = await getCartListAPI()
  list.value = result
}
onShow(()=>{
  // 可能是在商品刚刚添加跳进来, 需要每次显示都刷新数据
  getCartList()
})

// 修改数量
const changeNum = async (id, count) => {
  await updateCartAPI({
    id,
    count
  })
}

// 处理单品状态
const toggleSelect = async (id, selected) => {
  await updateCartAPI({
    id,
    selected: !selected
  })
  getCartList()
}

// 处理全选功能
// 独立商品的选择影响全选
const isAllSelected = computed(() => {
  // 判断是否所有商品的选项都已经选中, 只有every每一个都满足的情况,才是全选
  return list.value.every(item => item.selected === true)
})

// 全选点击影响独立商品
const toggleAllSelect = async () => {
  // 根据现在是否已经全选的状态, 取反发请求
  await toggleAllSelectAPI(!isAllSelected.value)
  // 请求成功后更新页面
  getCartList()
}

// 总价和总数量
const totalPrice = computed(() => {
  let res = 0
  list.value.forEach(item => {
    res += item.selected ? item.count * item.price : 0
  });
  return res
})

const totalCount = computed(() => {
  let res = 0
  list.value.forEach(item => {
    res += item.selected ? item.count : 0
  });
  return res
})

// 删除货物
const delCart = async (id) => {
  // 二次询问
  const { confirm } = await uni.showModal({
    content: '确认删除商品吗?'
  })
  // 用户点击确认
  if (confirm) {
    console.log(123);
    await deleteCartAPI(id)
    getCartList()
  }
}

const toOrder = () => {
  if(totalCount.value === 0) return uni.showToast({title: '请先选择购买商品', icon: 'none'})
 
  uni.navigateTo({
    url: '/pages/order/create/index'
  })
}
</script>

<template>
  <view class="main">
    <!-- 内容列表 -->
    <scroll-view scroll-y class="viewport">
      <!-- 购物车列表 -->
      <template v-if="store.profile.token">
        <!-- 优惠提示 -->
        <view class="tips">
          <text class="label">满减</text>
          <text class="desc">满1件, 即可享受9折优惠</text>
        </view>
        <view class="blank" v-show="list.length === 0">
          购物车还是空的，快来挑选好货吧
        </view>
        <!-- 购物车商品 -->
        <view class="carts">
          <uni-swipe-action>
            <uni-swipe-action-item class="swipe-cell" v-for="item in list" :key="item.skuId">
              <navigator hover-class="none" :url="'/pages/goods/index?id=' + item.id" class="card">
                <text @tap.stop="toggleSelect(item.skuId, item.selected)" class="checkbox"
                  :class="[`icon-${item.selected ? 'checked' : 'ring'}`]"></text>
                <!-- 商品缩略图 -->
                <image class="thumb" :src="item.picture"></image>
                <view class="meta">
                  <!-- 商品名称 -->
                  <view class="name ellipsis">{{ item.name }}</view>
                  <!-- 商品类型 -->
                  <view class="type ellipsis">{{ item.attrsText }}</view>
                  <!-- 价格 -->
                  <view class="price"> ¥{{ item.price }} </view>
                  <!-- 商品数量，阻止冒泡 -->
                  <view class="quantity" @tap.stop="() => { }">
                    <uni-number-box @change="changeNum(item.skuId, $event)" v-model="item.count" :min="1"
                      :max="item.stock" />
                  </view>
                </view>
              </navigator>

              <template v-slot:right>
                <view class="swipe-cell-action">
                  <button class="delete-button" @click="delCart(item.skuId)">删除</button>
                </view>
              </template>
            </uni-swipe-action-item>
          </uni-swipe-action>
        </view>
      </template>
      <view class="blank" v-else>
        <text>登后后可查看购物车中的商品</text>
        <navigator url="/pages/login/index" hover-class="none">
          <button class="button">去登录</button>
        </navigator>
      </view>
      <!-- 状态提示 -->
    </scroll-view>

    <!-- 底部操作栏 -->
    <view class="toolbar" v-if="true">
      <text @tap="toggleAllSelect" class="all" :class="{ checked: isAllSelected }">全选</text>
      <text class="text">合计:</text>
      <text class="amount">{{ totalPrice }}</text>
      <!-- 操作按钮 -->
      <view class="buttons">
        <view @tap="toOrder" class="button payment" :class="{ disabled: totalCount === 0 }">
          去结算({{ totalCount }})
        </view>
      </view>
    </view>
  </view>
</template>

<style lang="scss">
page {
  background-color: #f7f7f8;
  height: 100%;
}

.main {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.viewport {
  min-height: 400rpx;
}

/* 顶部工具栏 */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 88rpx;
  padding: 0 30rpx;
  font-size: 26rpx;
  color: #262626;
  background-color: #fff;

  .extra {
    display: flex;
    align-items: center;
    height: 24rpx;
    border-left: 1rpx solid #bfbfbf;

    .edit {
      padding: 0 30rpx;
    }

    .menu {
      width: 9rpx;
      height: 9rpx;
      padding: 14rpx;
      border-radius: 50%;
      background-color: #262626;
      background-clip: content-box;
      position: relative;

      &::before {
        left: 0;
      }

      &::after {
        right: 0;
      }
    }
  }
}

.topbar .extra .menu::before,
.topbar .extra .menu::after {
  position: absolute;
  top: 50%;
  content: "";
  width: 6rpx;
  height: 4rpx;
  background-color: #8c8c8c;
  transform: translateY(-50%);
  border-radius: 4rpx;
}

/* 优惠提示 */
.tips {
  display: flex;
  align-items: center;
  line-height: 1;
  padding: 30rpx;
  font-size: 26rpx;
  color: #666;

  .label {
    color: #fff;
    padding: 7rpx 15rpx 5rpx;
    border-radius: 4rpx;
    font-size: 24rpx;
    background-color: #27ba9b;
    margin-right: 10rpx;
  }
}

.carts {
  padding: 0 20rpx;

  .card {
    display: flex;
    padding: 20rpx 20rpx 20rpx 80rpx;
    border-radius: 10rpx;
    background-color: #fff;
    position: relative;

    .checkbox {
      position: absolute;
      top: 0;
      left: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      width: 80rpx;
      height: 100%;
      font-size: 40rpx;
      color: #444;
    }

    .icon-checked {
      color: #27ba9b;
    }

    .thumb {
      width: 170rpx;
      height: 170rpx;
    }

    .meta {
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      margin-left: 20rpx;
    }

    .name {
      height: 72rpx;
      font-size: 26rpx;
      color: #444;
    }

    .type {
      line-height: 1.8;
      padding: 0 15rpx;
      font-size: 24rpx;
      align-self: flex-start;
      border-radius: 4rpx;
      color: #888;
      background-color: #f7f7f8;
    }

    .price {
      line-height: 1;
      font-size: 26rpx;
      color: #444;
      margin-bottom: 2rpx;
    }

    .warning {
      color: #cf4444;
      font-size: 24rpx;
    }

    .quantity {
      position: absolute;
      bottom: 20rpx;
      right: 5rpx;
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 220rpx;
      height: 48rpx;

      .text {
        height: 100%;
        padding: 0 20rpx;
        font-size: 32rpx;
        color: #444;
      }

      .input {
        height: 100%;
        text-align: center;
        border-radius: 4rpx;
        font-size: 24rpx;
        color: #444;
        background-color: #f6f6f6;
      }
    }
  }

  .swipe-cell {
    display: block;
    margin-top: 20rpx;

    &:first-child {
      margin-top: 0;
    }
  }
}

/* 购物车商品 */
/* 购物车状态提示 */
.blank {
  padding: 100rpx 0 60rpx;
  text-align: center;
  color: #444;
  font-size: 26rpx;

  .button {
    width: 240rpx !important;
    height: 60rpx;
    line-height: 60rpx;
    margin-top: 25rpx;
    font-size: 26rpx;
    border-radius: 60rpx;
    color: #fff;
    background-color: #27ba9b;

    &::after {
      display: none;
    }
  }
}

/* 吸底工具栏 */
.toolbar {
  position: relative;
  padding: 32rpx 20rpx 28rpx;
  border-top: 1rpx solid #ededed;
  border-bottom: 1rpx solid #ededed;
  background-color: #fff;

  .all {
    margin-left: 25rpx;
    font-size: 14px;
    color: #444;

    &::before {
      font-family: "erabbit" !important;
      content: "\e6cd";
      font-size: 36rpx;
      margin-right: 8rpx;
      vertical-align: -4rpx;
    }
  }

  .checked {
    &::before {
      content: "\e6cc";
      color: #27ba9b;
    }
  }

  .text {
    margin-right: 8rpx;
    margin-left: 32rpx;
    color: #444;
    font-size: 14px;
  }

  .amount {
    font-size: 20px;
    color: #cf4444;
    vertical-align: -1px;

    &::before {
      content: "￥";
      font-size: 12px;
    }

    .decimal {
      font-size: 12px;
    }
  }

  .buttons {
    position: absolute;
    right: 10rpx;
    top: 50%;
    display: flex;
    justify-content: space-between;
    text-align: center;
    line-height: 72rpx;
    font-size: 13px;
    color: #fff;
    transform: translateY(-50%);

    .button {
      width: 240rpx;
      margin: 0 10rpx;
      border-radius: 72rpx;
    }
  }

  .payment {
    background-color: #27ba9b;
  }

  .disabled {
    opacity: 0.6;
  }

  .delete {
    display: none;
    background-color: #27ba9b;
  }

  .collect {
    display: none;
    background-color: #ffa868;
  }
}

.swipe-cell-action {
  display: flex;
  height: 100%;

  button {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 50px;
    padding: 6px;
    line-height: 1.5;
    color: #fff;
    font-size: 26rpx;
    border-radius: 0;
  }

  .collect-button {
    background-color: #ffa868;
  }

  .delete-button {
    background-color: #cf4444;
  }
}</style>